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Insects and allied parasites injurious to livestock and poultry in Canada / by Eric Hearle.

The mosquitoes of the lower Fraser valley, British Columbia, and their control : report of work carried out under the auspices of the National Research Council and the Entomological Branch, Department of Agriculture, Ottawa / by Eric Hearle.

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Insects and allied parasites injurious to livestock and poultry in Canada / by Eric Hearle.

The mosquitoes of the lower Fraser valley, British Columbia, and their control : report of work carried out under the auspices of the National Research Council and the Entomological Branch, Department of Agriculture, Ottawa / by Eric Hearle.